Effect of reinforcement type on high velocity impact response of GRP plates using a sharp tip projectile

摘要: Abstract High velocity impact performance of glass reinforced polyester (GRP) resin composite plates with different type reinforcement was investigated. The projectile used a sharp tipped (30°) conical head total length 30 mm and shank 15 mm weight 9.74 g. Five types E-glass fiber were used, including chopped strand mat (CSM), plain weave, satin unidirectional cross-ply reinforcements. A smooth barrel gas gun to conduct high tests in the range 80–160 m/s. Composite size 15 cm × 15 cm prepared 3 6 mm thickness. Results showed higher ballistic limit (velocity at which samples fully penetrated target zero residual velocity) for 3 mm GRP followed by weave CSM reinforcements almost same level. thicker specimens (6 mm), better towards impact, unidirectional, plates. Experimentally determined all correlate well estimated values obtained full perforation tests. Damage assessment conducted on indicated tension shear failure thin-walled sever delamination thick-walled as dominant modes.